Sorensen DCR40-70B

The Sorensen DCR40-70B is a DC power supply delivering 0–40 VDC and 0–70 ADC with 2800 W maximum output. Built for laboratory and industrial burn-in and test applications, it operates in both constant voltage (CV) and constant current (CC) modes with automatic crossover. The unit provides voltage regulation of 0.05% or 10 mV (whichever is greater) across line and load, current stability of 0.15% over 8 hours post warm-up, and 50 ms transient response to 50% load changes. Remote sensing capability enables accurate output regulation at the load terminals. Standard protection includes overvoltage protection (OVP) and adjustable current limiting with automatic recovery. Dual analog panel meters display output parameters; optional LCD digital meters are available. Input voltage options span 115 VAC, 208 VAC, and 208/220/230 VAC configurations, all operating at 50/60 Hz without derating.

– Technical Specifications

• Output voltage: 0–40 VDC
• Output current: 0–70 ADC
• Maximum power: 2800 W
• Voltage regulation: 0.05% or 10 mV, whichever is greater; 0.03% typical line and load
• Current regulation: 0.15% of maximum for 8 hours after 30-minute warm-up
• Stability: 0.1% of voltage, maximum (8 hours post warm-up)
• Temperature coefficient: 0.03%/°C of output voltage, maximum
• Ripple (RMS): 65–1200 mV RMS (model dependent)
• Transient response: 50 ms typical at 50% load change
• Input frequency: 50/60 Hz without derating
• Remote sensing: Maximum 5% of maximum voltage or 3 V per load lead, whichever is smaller
• Weight (Case Size I): 45 lbs (21.8 kg); shipping weight 65 lbs (29.5 kg)
• Weight (Case Size II): 53 lbs (24 kg)

– Key Features

• Automatic CV/CC crossover for variable load conditions
• Remote voltage and current programming standard
• Overvoltage protection (OVP) standard
• Adjustable current limiting with automatic recovery
• Dual analog panel meters; optional LCD digital display (Option M50)
• Multiple input voltage configurations: 115 VAC, 208 VAC, 208/220/230 VAC
• Optional input voltages: 220 VAC ±10% (M2), 230 VAC ±10% (M3)

– Typical Applications

• Component burn-in testing
• Laboratory power sourcing
• Industrial load testing
• Device characterization under variable load conditions

– Compatibility & Integration

The DCR40-70B is part of the Sorensen DCR-B Series and integrates remote programming for both voltage and current control. Remote sensing capability ensures precise regulation independent of lead resistance.